123434 has 4 divisors (see below), whose sum is σ = 185154. Its totient is φ = 61716.

The previous prime is 123433. The next prime is 123439. The reversal of 123434 is 434321.

123434 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434321 = 19 ⋅22859.

It can be written as a sum of positive squares in only one way, i.e., 120409 + 3025 = 347^2 + 55^2 .

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (123433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30857 + ... + 30860.

2¹²³⁴³⁴ is an apocalyptic number.

123434 is a deficient number, since it is larger than the sum of its proper divisors (61720).

123434 is an equidigital number, since it uses as much as digits as its factorization.

123434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61719.

The product of its digits is 288, while the sum is 17.

The square root of 123434 is about 351.3317520521. The cubic root of 123434 is about 49.7903219313.

Adding to 123434 its reverse (434321), we get a palindrome (557755).

The spelling of 123434 in words is "one hundred twenty-three thousand, four hundred thirty-four".